package companyTest.xiecheng;

import java.util.Scanner;

public class Main1 {
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        String s=in.nextLine();
        StringBuilder sb=new StringBuilder();
        for (int i = 0; i < s.length(); i++) {
            sb.append(change(s.charAt(i)));
        }
        System.out.println(sb.toString());
    }
    public static char change(char c){
        if (c>='a'&&c<='z'){
            if (c=='a')return 'z';
            return (char)(c-1);
        }
        if (c>='A'&&c<='Z'){
            if (c=='Z')return 'A';
            return (char)(c+1);
        }
        return c;
    }
}
